Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4978248 | Advanceable mine roof supports | Gerhard Sprenger | 1990-12-18 |
| RE31346 | Advance mechanism for a mine roof support assembly | Kunibert Becker, Willy Heyer, Lubomir Plevak | 1983-08-16 |
| 4266891 | Support assemblies for mine workings | Lubomir Plevak | 1981-05-12 |
| 4242014 | Pivot joint for underground mining installations | Lubomir Plevak | 1980-12-30 |
| 4195953 | Advance mechanism for a mine roof support assembly | Kunibert Becker, Willy Heyer, Lubomir Plevak | 1980-04-01 |
| 4187042 | Advance mechanism for a mine roof support unit | Lubomir Plevak | 1980-02-05 |